# SI2309S

**BORN** · MOSFETs · SOT-23-3L

SI2309S from BORN, in a SOT-23-3L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | G | input | Gate of the P-channel MOSFET, with a maximum gate-source voltage of ±20 V and a gate threshold voltage of -1.0 V min to -3 V max at ID = -250 uA. |
| 2 | S | passive | Source of the P-channel MOSFET, where the body diode forward voltage is -1.2 V max at IS = -1.2 A. |
| 3 | D | passive | Drain of the P-channel MOSFET, rated for -60 V drain-source voltage and -1.9 A continuous drain current at TA = 25 °C. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | BORN |
| Package | SOT-23-3L |
| Category | Triode/MOS Tube/Transistor |
| Pins | 3 |

## CAD (KiCad official)

- Symbol: `SI2309S`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files: `si2309s-etched.step` / `si2309s-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `si2309s.step` / `si2309s.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [BORN datasheet](docs/si2309s-datasheet.pdf) (5 pp, sha256 `9b60bd86acc8cc03`, retrieved 2026-10-28, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/si2309s-datasheet.pdf)